Photovoltaic inverter and energy storage inverter

Photovoltaic inverter is one of the core components in photovoltaic systems. Its main function is to convert the direct current (DC) generated by solar panels into alternating current (AC) for use in households or businesses, or to transmit it to the power grid. The efficiency and performance of photovoltaic inverters directly affect the power generation efficiency and economic benefits of the entire photovoltaic system. There are many types of photovoltaic inverters, which can be mainly divided into centralized, string type, and micro inverters. Centralized inverters are suitable for large photovoltaic power plants and can convert the direct current from multiple solar panels into alternating current. String inverters are suitable for small and medium-sized photovoltaic systems, where each inverter is responsible for the conversion of a set of solar panels. Micro inverters are designed for individual solar panels, which can improve the flexibility and reliability of the system. Photovoltaic inverters not only have AC/DC conversion functions, but also have the ability to maximize solar cell performance and system fault protection functions, mainly including maximum power tracking control, anti islanding protection, and low voltage ride through.

Energy storage inverter, also known as energy storage converter (PCS), is a key equipment in energy storage systems. Its main function is to control the charging and discharging process of the battery, achieving bidirectional conversion of electrical energy. In the power system, energy storage inverters can improve energy utilization efficiency, balance supply and demand, and enhance the stability of the power grid. The energy storage inverter controls the charging and discharging process of the energy storage battery in the energy storage integrated system, converting the DC power output by the battery system into AC power that can be transmitted to the grid and other loads. By receiving control instructions from the energy management system (EMS) and interacting with the battery management system (BMS) in real time to obtain information about the battery system, it can quickly and accurately control the charging and discharging voltage and current, ensuring battery safety while improving power transmission efficiency and quality. Energy storage inverters can adapt to different voltage levels, capacity sizes, network topologies, and operating modes according to different application scenarios. According to application scenarios, it can be divided into four categories: household, industrial and commercial, centralized, and energy storage power stations, corresponding to low power (<10KW), medium power (10KW-250KW), high power (250KW-1MW), and ultra high power (>1MW), respectively.